Add printf format attributes
When compiling with gcc, we already include the attribute on check_msg()
to give compiler warnings about mismatches between printf() like format
strings and the corresponding arguments. This patch adds similar
attributes for lexical_error() and die().
Suggested-by: Nicolas Iooss <[email protected]>
Signed-off-by: David Gibson <[email protected]>
diff --git a/util.h b/util.h
index 35b2bda..bc3d223 100644
--- a/util.h
+++ b/util.h
@@ -27,7 +27,13 @@
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
-static inline void __attribute__((noreturn)) die(const char *str, ...)
+#ifdef __GNUC__
+static inline void
+__attribute__((noreturn)) __attribute__((format (printf, 1, 2)))
+die(const char *str, ...)
+#else
+static inline void die(const char *str, ...)
+#endif
{
va_list ap;
@@ -59,7 +65,13 @@
}
extern char *xstrdup(const char *s);
+
+#ifdef __GNUC__
+extern int __attribute__((format (printf, 2, 3)))
+xasprintf(char **strp, const char *fmt, ...);
+#else
extern int xasprintf(char **strp, const char *fmt, ...);
+#endif
extern char *join_path(const char *path, const char *name);
/**
